example_test.go

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package pem_test
     6  
     7  import (
     8  	"crypto/x509"
     9  	"encoding/pem"
    10  	"fmt"
    11  	"log"
    12  	"os"
    13  )
    14  
    15  func ExampleDecode() {
    16  	var pubPEMData = []byte(`
    17  -----BEGIN PUBLIC KEY-----
    18  MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAlRuRnThUjU8/prwYxbty
    19  WPT9pURI3lbsKMiB6Fn/VHOKE13p4D8xgOCADpdRagdT6n4etr9atzDKUSvpMtR3
    20  CP5noNc97WiNCggBjVWhs7szEe8ugyqF23XwpHQ6uV1LKH50m92MbOWfCtjU9p/x
    21  qhNpQQ1AZhqNy5Gevap5k8XzRmjSldNAFZMY7Yv3Gi+nyCwGwpVtBUwhuLzgNFK/
    22  yDtw2WcWmUU7NuC8Q6MWvPebxVtCfVp/iQU6q60yyt6aGOBkhAX0LpKAEhKidixY
    23  nP9PNVBvxgu3XZ4P36gZV6+ummKdBVnc3NqwBLu5+CcdRdusmHPHd5pHf4/38Z3/
    24  6qU2a/fPvWzceVTEgZ47QjFMTCTmCwNt29cvi7zZeQzjtwQgn4ipN9NibRH/Ax/q
    25  TbIzHfrJ1xa2RteWSdFjwtxi9C20HUkjXSeI4YlzQMH0fPX6KCE7aVePTOnB69I/
    26  a9/q96DiXZajwlpq3wFctrs1oXqBp5DVrCIj8hU2wNgB7LtQ1mCtsYz//heai0K9
    27  PhE4X6hiE0YmeAZjR0uHl8M/5aW9xCoJ72+12kKpWAa0SFRWLy6FejNYCYpkupVJ
    28  yecLk/4L1W0l6jQQZnWErXZYe0PNFcmwGXy1Rep83kfBRNKRy5tvocalLlwXLdUk
    29  AIU+2GKjyT3iMuzZxxFxPFMCAwEAAQ==
    30  -----END PUBLIC KEY-----
    31  and some more`)
    32  
    33  	block, rest := pem.Decode(pubPEMData)
    34  	if block == nil || block.Type != "PUBLIC KEY" {
    35  		log.Fatal("failed to decode PEM block containing public key")
    36  	}
    37  
    38  	pub, err := x509.ParsePKIXPublicKey(block.Bytes)
    39  	if err != nil {
    40  		log.Fatal(err)
    41  	}
    42  
    43  	fmt.Printf("Got a %T, with remaining data: %q", pub, rest)
    44  	// Output: Got a *rsa.PublicKey, with remaining data: "and some more"
    45  }
    46  
    47  func ExampleEncode() {
    48  	block := &pem.Block{
    49  		Type: "MESSAGE",
    50  		Headers: map[string]string{
    51  			"Animal": "Gopher",
    52  		},
    53  		Bytes: []byte("test"),
    54  	}
    55  
    56  	if err := pem.Encode(os.Stdout, block); err != nil {
    57  		log.Fatal(err)
    58  	}
    59  	// Output:
    60  	// -----BEGIN MESSAGE-----
    61  	// Animal: Gopher
    62  	//
    63  	// dGVzdA==
    64  	// -----END MESSAGE-----
    65  }
    66
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